Class [Mammalia] Linnaeus, 1758 - mammals
   Order Cetacea Brisson, 1762 - whales, dolphins, and porpoises see Infraorder Cetacea Brisson, 1762
     Suborder Mysticeti Cope, 1891 - baleen whales see Parvorder Mysticeti Cope, 1891
       Family Eschrichtiidae Ellerman & Morrison-Scott, 1951 - gray whales
         Genus Eschrichtius Gray, 1864 - gray whale
           1 Eschrichtius robustus (Lilljeborg, 1861) - gray whale